It's possible to turn off kernel lockdown by emulating a USB keyboard via USB/IP and sending an Alt+SysRq+X key combination through it.
Ubuntu's kernels have USB/IP enabled (CONFIG_USBIP_VHCI_HCD=m and CONFIG_USBIP_CORE=m) with signed usbip_core and vhci_hcd modules provided in the linux-extra-modules-* package.
It's possible to turn off kernel lockdown by emulating a USB keyboard via USB/IP and sending an Alt+SysRq+X key combination through it.
Ubuntu's kernels have USB/IP enabled (CONFIG_ USBIP_VHCI_ HCD=m and CONFIG_ USBIP_CORE= m) with signed usbip_core and vhci_hcd modules provided in the linux-extra- modules- * package.
See the PoC here: https:/ /github. com/xairy/ unlockdown# method- 1-usbip